Hot-blast stove.



Iii j 'Patented luly I0, I900.

J. KENNEDY.

HOT BLAST STOVE.

(Application filed Apr. 4, 1900.)

No. 653,5l5.

. (No Model.)

R o N E V N prrzns co. Puma-Limo WITNESSES NITED STATES HOT BLAST STOVE.

SPECIFICATION forming part Of Letters Patent NO. 653,515, dated July 10,1900. Application filed April 4, 1900. Serial No. 11,465. (N0 model.)

To all whom it may concern.-

Be it known that I, JULIAN KENNEDY, of Pittsburg, in the county ofAllegheny and State of Pennsylvania, have invented a new and usefulImprovement in Hot-Blast Stoves, of which the following is a full,clear, and exact description, reference being had to the accompanyingdrawings, forming part of this specification, in which- Figure l is atop plan view of a portion of a checker-work in my improved stove. Fig.2 is a partial vertical section on the irregular line II II of Fig. 1,and Fig. 3 is a perspective view of one of the bricks employed.

My invention relates 'to the regenerative checker-Work of hot-blaststoves of that type wherein the bricks are provided at opposite endswith projections which interl ck with the bricks of the cross-walls; andits object is to so form these bricks that slight variations in theirshape and thickness may be allowed for and the building up of thecheckerwork made easier than heretofore.

To that end it consists in forming the brick with an interlockingprojection on each end, which projection is of a length greater thanone-half the thickness of the bricks which it engages.

In the drawings, 2 2 represent bricks of parallel walls in thechecker-work, and 3 3 the bricks of the cross-walls at right angles tothe first-named walls and parallel to each other. Each of these bricksis of ordinary form, except that it is provided on opposite ends withinterlocking projections 4, as shown in Fig. 3, which projections arelonger than one-half the width of the bricks engaged by the projections.These projections are formed by recessesin the ends of thebrick and arepreferablyin its middle. I have shown the bricks of both walls as alike,and. n thi at 3: the

- projection is longer than one-half the thickness of the brick itself;but if one wall is composed of thicker bricks than the wall crossing 1tthe bricks of the cross-wall would be provided with projections greateralso than the thickness of the bricks in the walls which they cross.When a Wall is laid up of these bricks applied end to end, as shown,openings are left between the ends of the brick which are wider than thebricks of the wall built across it, so that the latter can be easilydropped into place. The preferred manner of building up checker-work isclearly shown in Figs. 1 and 2.

The advantages of myinvention result from providing the brick withprojections at each end which are longer than one-half the thickness ofthe brick which they enter, since the checkenwork may be much moreeasily built up than where the bricks are a close fit, and, moreover,slight variations in the size and shape of the bricks do not interferewith the building up, as they otherwise-would.

The projections may be located otherwise than at the middle of the endsof the brick, and many other variations may be made in the form and sizeof the brick without departing from my invention. as defined in theclaims.

I claim- 1. In checker-work, a brick having projections at its endsentering transverse openings in other bricks, each projection having alength greater than one-half the thickness of the brick which itengages, substantially as described.

2. Checker-work having intersecting walls formed of bricks of similarthickness, each brick at the points of intersection of the walls havingan interlocking projection at each end entering openings in thecross-wall, each proj ection having a length greater than one-half thethickness of the brick which it engages; substantially as described.

In testimony whereof I have hereunto set my hand.

JULIAN KENNEDY.

Witnesses:

ALICE 0. SHORT, F. McCLAIN.

